Builds defensible TAM/SAM/SOM models with bottom-up and top-down triangulation.
Click to play with sound.
---
name: Market Sizing
description: Build a credible TAM/SAM/SOM with bottom-up and top-down triangulation.
---
# Market Sizing
A market size number is only useful if it is defensible. Investors have seen a
thousand "100B TAM" slides and discount all of them. This skill builds a number
you can defend under questioning by showing your work.
## The Three Layers
- **TAM (Total Addressable Market)**: total spend if everyone who could buy,
did, at your price. The ceiling.
- **SAM (Serviceable Addressable Market)**: the slice you can actually reach
given product, geography, and segment.
- **SOM (Serviceable Obtainable Market)**: what you can realistically win in
3-5 years given competition and execution. The number that matters for
planning.
## Build Bottom-Up First
Bottom-up is the credible method; build it before you ever cite a top-down
analyst report.… install to load the full skillSign in to rate and review this skill.
No reviews yet. Be the first to review this skill.